Frame identification help

[AdamHamzah]

So I have this old track bike which I'm trying to identify so I can sell it.
I'm pretty sure it's New Zealand made.
There's two frame markings: 5255 on the bb shell and 73 on the seat tube seat clamp.

It was ridden in Christchurch, New Zealand its whole life so I'd imagine it'd be made by New Zealand frame manufacturer.

I'm trying to sell it because I have too many bikes and it's sell a lot better if the bike had a name.

Pics are below.
whole bike:
https://imgur.com/Az92Vhy (link is external)

Seatclamp:
https://imgur.com/wkPrwrx (link is external)

BB shell:
https://imgur.com/mOVcLdY (link is external)

headtube:
https://imgur.com/1eJbeaH (link is external)

Fork:
https://imgur.com/lsdbXUY (link is external)

Rear brake bridge:
https://imgur.com/vKTDBZ0 (link is external)

Dropouts:
https://imgur.com/2QUgdD8 (link is external)

Thanks for any help that is provided